20914289 has 4 divisors (see below), whose sum is σ = 22815600. Its totient is φ = 19012980.

The previous prime is 20914279. The next prime is 20914319. The reversal of 20914289 is 98241902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20914289 - 2¹⁶ = 20848753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20914219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950639 + ... + 950660.

It is an arithmetic number, because the mean of its divisors is an integer number (5703900).

Almost surely, 2^20914289 is an apocalyptic number.

It is an amenable number.

20914289 is a deficient number, since it is larger than the sum of its proper divisors (1901311).

20914289 is a wasteful number, since it uses less digits than its factorization.

20914289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901310.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 20914289 is about 4573.2142963128. The cubic root of 20914289 is about 275.5165563725.

The spelling of 20914289 in words is "twenty million, nine hundred fourteen thousand, two hundred eighty-nine".